11642732544 has 144 divisors (see below), whose sum is σ = 32149217520. Its totient is φ = 3743416320.

The previous prime is 11642732531. The next prime is 11642732561. The reversal of 11642732544 is 44523724611.

It is a super-2 number, since 2×11642732544² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11402754 + ... + 11403774.

It is an arithmetic number, because the mean of its divisors is an integer number (223258455).

Almost surely, 2^11642732544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11642732544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16074608760).

11642732544 is an abundant number, since it is smaller than the sum of its proper divisors (20506484976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11642732544 is an frugal number, since it uses more digits than its factorization.

11642732544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1055 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The spelling of 11642732544 in words is "eleven billion, six hundred forty-two million, seven hundred thirty-two thousand, five hundred forty-four".